<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form id="form1" action="http://www.baidu.com" onsubmit="return checkForm(this)">

    <select name="nation" id="nation">
        <option value="http://www.baidu.com">请选择</option>
        <option>aa</option>
        <option selected>bb</option>
        <option>cc</option>
    </select>
    <select name="pp" class="PropelPagerForm" >
        <option value="1" selected="">1</option>
        <option value="2">2</option>
        <option value="3">3</option>
        <option value="4">4</option>
        <option value="5">5</option>
        <option value="6">6</option>
        <option value="7">7</option>
        <option value="8">8</option>
        <option value="9">9</option>
        <option value="10">10</option>
        <option value="11">11</option>
        <option value="12">12</option>
        <option value="13">13</option>
        <option value="14">14</option>
        <option value="15">15</option>
        <option value="16">16</option>
        <option value="17">17</option>
        <option value="18">18</option>
        <option value="19">19</option>
        <option value="20">20</option>
        <option value="21">21</option>
        <option value="22">22</option>
        <option value="23">23</option>
        <option value="24">24</option>
        <option value="25">25</option>
        <option value="26">26</option>
        <option value="27">27</option>
        <option value="28">28</option>
        <option value="29">29</option>
        <option value="30">30</option>
        <option value="31">31</option>
        <option value="32">32</option>
        <option value="33">33</option>
        <option value="34">34</option>
        <option value="35">35</option>
        <option value="36">36</option>
        <option value="37">37</option>
        <option value="38">38</option>
        <option value="39">39</option>
        <option value="40">40</option>
        <option value="41">41</option>
        <option value="42">42</option>
        <option value="43">43</option>
        <option value="44">44</option>
        <option value="45">45</option>
        <option value="46">46</option>
        <option value="47">47</option>
        <option value="48">48</option>
        <option value="49">49</option>
        <option value="50">50</option>
    </select>
</form>
<script>
var nationObj = document.getElementById('nation');
var pp = document.getElementsByName('pp')[0];
nationObj.onchange = function(){
    window.open(this.value)
}

//onchange="location='/news/list/id/ah/orderby/time/page/'+this.value+'#list'"
    pp.onchange = function(){
        window.location.href = 'http://365jia.cn/news/list/id/ah/orderby/time/page/'+this.value+'#list'
    }

</script>
</body>
</html>